Struct MaskDescriptor 

pub struct MaskDescriptor {
    pub method: String,
    pub offset: u64,
    pub length: u64,
    pub params: BTreeMap<String, Value>,
}

On-wire descriptor for one of the three NaN / Inf companion-frame masks (see plans/WIRE_FORMAT.md §6.5.1).

offset and length locate the mask blob inside the frame’s payload region; method names the compression scheme (rle, roaring, blosc2, zstd, lz4, or none); params carries any method-specific parameters (e.g. zstd level, blosc2 sub-codec).

Fields

method: String

Canonical method name — rle | roaring | blosc2 | zstd | lz4 | none.

offset: u64

Byte offset of the mask blob, measured from the start of the frame’s payload region (= the first byte after the 16-byte frame header).

length: u64

Byte length of the (compressed) mask blob on disk.

params: BTreeMap<String, Value>

Method-specific parameters (e.g. { "level": 3 } for zstd). Empty map is serialised as absent to match the canonical zero-cost form.

Trait Implementations

impl Clone for MaskDescriptor

fn clone(&self) -> MaskDescriptor

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MaskDescriptor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MaskDescriptor

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MaskDescriptor

fn eq(&self, other: &MaskDescriptor) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MaskDescriptor

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MaskDescriptor